MOSCIA will now uses utils/bcd and TOD clock should work... untested.

src/MOSCIA.js

@@ -1,10 +1,6 @@
 const Clock = require('common/clock.js');
+const BCD = require('utils/bcd.js');
 
-function Num2BCD(n){
-  let v = (n < 9) ? Math.floor(n / 10) : 0;
-  v = (v << 4) | (n - (v * 10));
-  return v;
-}
 
 class MOSCIA{
   constructor(){
@@ -50,14 +46,14 @@ class MOSCIA{
         break;
       case 0x08: // 10th of Sec Reg
         this.__TODLatch = 0;
-        return Num2BCD(this.__10ths); break;
+        return this.__10ths; break;
       case 0x09: // Seconds Reg
-        return Num2BCD(this.__sec); break;
+        return this.__sec; break;
       case 0x0A: // Minutes Reg
-        return Num2BCD(this.__min); break;
+        return this.__min; break;
       case 0x0B: // Hours AM/PM Reg
         this.__TODLatch = 1;
-        return Num2BCD(this.__hours); break;
+        return this.__hours; break;
       case 0x0C: // Serial Data
         break;
       case 0x0D: // Interrupt Control
@@ -119,6 +115,21 @@ class MOSCIA{
     this.__TODTick += 1;
     if (this.__TODTick === 6){
       this.__TODTick = this.__CTA & 0x01;
+      if (this.__10ths == 0x09){
+        this.__10ths = 0;
+        if (this.__sec == 0x59){
+          this.__sec = 0;
+          if (this.__min == 0x59){
+            this.__min = 0;
+            if (this.__hour == 0x11 || this.__hour == 0x91){
+              this.__hour = (this.__hour == 0x91) ? 0x00 : 0x10;
+            } else {
+              let pm = this.__hour & 0x80;
+              this.__hour = BCD.add(this.__hour & 0x7F, 0x01, 2) | pm;
+            }
+          } else {this.__min = BCD.add(this.__min, 0x01, 2);}
+        } else {this.__sec = BCD.add(this.__sec, 0x01, 2);}
+      } else {this.__10ths = BCD.add(this.__10ths, 0x01, 2);}
     }
   }
 }